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fomenos
2 years ago
9

2.00−g sample of a metal X (that is known to form X2+ ions) was added to 0.100 L of 0.500 M H2SO4. After all the metal had react

ed, the remaining acid required 0.0637 L of 0.500 M NaOH solution for neutralization. Calculate the molar mass of the metal and identify the elemen
Chemistry
1 answer:
xz_007 [3.2K]2 years ago
3 0

Answer:

the molar mass is 40 and the metal is Calcium

Explanation:

X + H2SO4=X2SO4 + H2

The mole ratio is 1:1

no of mole of H2SO4= conc(M) × Vol(L)

=0.1×0.5

=0.05 mol

from the balanced chemical equation of the reaction

no of mole of 'X' = no of mole of H2SO4

thus no of mole of X=0.05 mol

Also, no of mole=mass/molar mass

molar mass of 'X'=mol/mass

=2/0.05

=40

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2.083 Liters of 6.0 M solution sulfuric acid is required. This solved using molecular calculations and Titration.

Solution: 2Al(s)+3H_2SO_4(aq) = Al_2(SO_4)_3(aq)+3H_2(g)

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<h3>What is Titration?</h3>
  • Titration, commonly referred to as titrimetry, is a typical quantitative chemical analysis method used in laboratories to ascertain the unidentified quantity of an analyte .
  • Titration is frequently referred to as volumetric analysis because it relies heavily on volume measurements. The titrant or titrator is a reagent that is prepared as a standard solution.
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  • Titrations come in a variety of forms with various protocols and objectives. Redox and acid-base titrations are the two most typical types of qualitative titrations.

To learn more about titration with the given link

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Explanation:

Hello,

In this case, since a change in science is widely known to be considered as a subtraction between the the final and initial values of two measured variables and is represented via Δ, here the final density is 5.43 g/mL and the initial one was 3.21 g/mL, therefore, the change in density is:

\Delta \rho=\rho _f-\rho _i\\ \\\Delta \rho=5.43g/mL-3.21g/mL\\\\\Delta \rho =2.22 g/mL

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